Thanks for your advice bill.
Forgive for being thick but how do I know the size of crank cassette etc. do I literally count
The teeth on the cogs etc.
Originally Posted by
Bill Kapaun
Claris is a "road" RDER and won't have enough chain wrap capacity. It possily wouldn't handle your largest cog either, depending on how large it is.
Get a "Mountain" RDER, such as Altus, Acera, Alivio, Deore etc.
Chain wrap =
(Largest-smallest chain ring) + (largest-smallest cog)
Example- if you had a 22-32-44 crank & 11-34 cassette.
(44-22) + (34-11)
=22+23
=45T chain wrap capacity needed.
It appears a Claris GS has a max of either 37 or 41 according to a quick internet search.
Looked it up-
2400 SS has 37T
2400 GS has 41T
Largest cog 32T